linux-kernel - arch/x86/xen/smp_hvm.c:77:3: error: use of undeclared identifier 'nopvspin'

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Date:   Sat, 16 Jan 2021 07:27:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     David Woodhouse <dwmw@...zon.co.uk>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: arch/x86/xen/smp_hvm.c:77:3: error: use of undeclared identifier
 'nopvspin'

Hi David,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f4e087c666f54559cb4e530af1fbfc9967e14a15
commit: 3d7746bea92530e8695258a3cf3ddec7a135edd6 x86/xen: Fix xen_hvm_smp_init() when vector callback not available
date:   2 days ago
config: x86_64-randconfig-a003-20210116 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5b42fd8dd4e7e29125a09a41a33af7c9cb57d144)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3d7746bea92530e8695258a3cf3ddec7a135edd6
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 3d7746bea92530e8695258a3cf3ddec7a135edd6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> arch/x86/xen/smp_hvm.c:77:3: error: use of undeclared identifier 'nopvspin'
                   nopvspin = true;
                   ^
   1 error generated.


vim +/nopvspin +77 arch/x86/xen/smp_hvm.c

    68	
    69	void __init xen_hvm_smp_init(void)
    70	{
    71		smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu;
    72		smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
    73		smp_ops.smp_cpus_done = xen_smp_cpus_done;
    74		smp_ops.cpu_die = xen_hvm_cpu_die;
    75	
    76		if (!xen_have_vector_callback) {
  > 77			nopvspin = true;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (45624 bytes)